<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="text/javascript">
			//是一个类数组对象，arguments.length可以用来获取实参的长度
			function fun(a,b)
			{
				console.log(arguments instanceof Array);
				console.log(Array.isArray(arguments));
				console.log(arguments.length);
				console.log(arguments[0]);
				console.log(arguments.callee);  //这函数对象本身
				console.log(arguments.callee==fun);  
			}
			fun(5,6);
		</script>
	</head>
	<body>
	</body>
</html>